21461360903 has 2 divisors, whose sum is σ = 21461360904. Its totient is φ = 21461360902.

The previous prime is 21461360887. The next prime is 21461360911. The reversal of 21461360903 is 30906316412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21461360903 - 2⁴ = 21461360887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21461360923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10730680451 + 10730680452.

It is an arithmetic number, because the mean of its divisors is an integer number (10730680452).

Almost surely, 2^21461360903 is an apocalyptic number.

21461360903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21461360903 is an equidigital number, since it uses as much as digits as its factorization.

21461360903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 21461360903 in words is "twenty-one billion, four hundred sixty-one million, three hundred sixty thousand, nine hundred three".